Hangzhou Foresee Group Holding Co., Ltd.

Hangzhou Magmax Technology Co., Ltd.

Lichun Zhan

Jinghui Di

Shujun Shen

Shengli Jia

Qifeng Wei

Pengfei Ge

The present application relates to a preparation method of neodymium iron boron products and the neodymium iron boron product prepared by using the same. The preparation method of neodymium iron boron products includes the following steps: Step S1: preparing blank magnet; Step S2: obtaining preprocessed sheets; Step S3: surface treating; Step S4: heavy rare earth coating; Step S5: stacking: stacking a plurality of preprocessed sheets to give stacked magnets; and Step S6: grain boundary diffusion: successively subjecting the stacked magnets to a primary heat treatment for 2-40 min, a secondary heat treatment at 700-1000&#xb0; C. for 4-40 h, and then tempering at 450-700&#xb0; C., in which the primary heat treatment is induction heat treatment or electric spark sintering.

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Zhejiang, China

Lichun Zhan